class_docstr: Tests for attraction matrix
docstr: Test that attraction_matrix returns the correct matrix.
docstr_tok: ["Test","that","attraction_matrix","returns","the","correct","matrix","."]
code: def test_attraction_matrix(self, symbols, geometry, alpha, v_ref):
      r"""Test that attraction_matrix returns the correct matrix."""
      mol = qchem.Molecule(symbols, geometry, alpha=alpha)
      args = [mol.alpha]
      v = qchem.attraction_matrix(
          mol.basis_set, mol.nuclear_charges, mol.coordinates
      )(*args)
      assert np.allclose(v, v_ref)
  
imports: import pytest
  import pennylane
  from pennylane import numpy
  from pennylane import qchem
label_desc: Use image node_id 1 for calling the TestAttractionMat obj's underlying member method code with example usage: obj.test_attraction_matrix(symbols, geometry, alpha, v_ref) without return types